Friday, 20 November 2015

Human Body

Brain

The brain is the center of the human nervous system, controlling our thoughts, movements, memories and decisions
The brain contains billions of nerve cells that send and receive information around the body.
The largest part of the human brain is called the cerebrum. Other important parts include corpus callosum, cerebral cortex, thalamus, cerebellum, hypothalamus, hippocampus and brain stem.

Blood

Blood makes up around 7% of the weight of a human body.
Blood contains red blood cells, white blood cells and platelets.
Red blood cells have the important job of carrying oxygen around the body.
White blood cells are an important part of the body’s immune system.
Platelets help blood clot in order to limit bleeding when your skin is cut.

Ear

Ears convert sound waves into nerve impulses that are sent to the brain.
The middle part of the ear (behind the ear drum) amplifies sound pressure.
The inner ear is found inside the temporal bone, the hardest bone in the human body.

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Eye

Eyes detect light and allow us to see.
The information our eyes receive is sent to our brain along the optic nerve.
The part of the eye that allows us to focus on different things in known as the lens.

Hair

Hair fibers or strands, grow from an organ in the area under the skin called a follicle,
On humans, hair can grow everywhere except for a few places such as on the palms of the hands, the soles of the feet and on the lips
Human facial hair grows faster than any other hair on the body

Heart

The heart is one of the most important organs in the human body, continuously pumping blood around our body through blood vessels.
The heart is made up of four chambers, the left atrium, right atrium, left ventricle and right ventricle.
Electricity going through your heart makes the muscle cells contract.

Lung

The primary functions of your lungs are to transport oxygen.
When resting, the average adult breathes around 12 to 20 times a minute
An average person breathes in around 11,000 litres of air every day.

Skin

Skin is the human body’s largest organ.
The layers of mammal skin include the epidermis, dermis and subcutis.
A large amount of the dust in you home is actually dead skin.